Comparative analysis of 3 T versus 1.5 T MRCP image quality and age-stratified biliary normative values in infants
Xiaorui Zhao1, Wenjing Huang1, Xiaozhu Huang1
1Department of Radiology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou, 510623, Guangdong, China.
Insights
A 3.0 Tesla (T) MRI scanner significantly improves Magnetic Resonance Cholangiopancreatography (MRCP) image quality in infants compared to 1.5 T. This higher magnetic field strength is crucial for accurate diagnosis and establishing normal infant biliary system development reference values.
Area of Science:
- Medical Imaging
- Pediatric Radiology
- Diagnostic Technology
Background:
- Magnetic Resonance Cholangiopancreatography (MRCP) is vital for evaluating the infant biliary system.
- Image quality in infant MRCP can be affected by various factors, including magnetic field strength.
- Establishing normative data for infant biliary system development is essential for accurate diagnosis.
Purpose of the Study:
- To assess the impact of 1.5 Tesla (T) versus 3.0 T magnetic field strength on MRCP image quality in infants (0-12 months).
- To determine age-stratified reference values for normal infant biliary system diameters.
- To identify predictors of diagnostic MRCP image quality in infants.
Main Methods:
- Retrospective analysis of 155 infant MRCP scans (1.5 T and 3.0 T).
- Image quality assessed by two radiologists (excellent, moderate, poor).
- Statistical analysis including multivariate logistic regression to identify predictors of diagnostic quality.
Main Results:
- 3.0 T scanners yielded significantly higher rates of excellent-quality MRCP images (46.39% vs. 20.69%) and lower non-diagnostic rates (14.43% vs. 46.55%) compared to 1.5 T.
- Higher magnetic field strength was the sole independent predictor of diagnostic image quality (P < 0.001).
- Age-stratified reference values for common bile duct (CBD) diameter were established, showing growth from 1.68 ± 0.26 mm (0-1 month) to 2.17 ± 0.40 mm (3-12 months).
Conclusions:
- Magnetic field strength is the primary determinant of infant MRCP image quality.
- A 3.0 T scanner provides superior diagnostic performance for infant MRCP.
- The study establishes crucial age-dependent reference values for infant biliary dimensions using 3.0 T MRCP.
Objectives:
To evaluate the impact of magnetic field strength on MRCP image quality in infants aged 0-12 months, and to establish age-stratified reference values for physiological the diameter of normal infant biliary system development.
Methods:
This retrospective study included 155 infants undergoing MRCP with either a 1.5 T or 3.0 T magnetic field strength. Image quality was rated as excellent, moderate, or poor by two radiologists. The correlation between MRCP image quality and gender, age, body weight, magnetic field strength, and the diameter of normal infant biliary system were analyzed. Multivariate logistic regression identified independent predictors of diagnostic image quality.
Results:
The 3.0 T scanner significantly outperformed the 1.5 T system in producing excellent-quality images (46.39% vs. 20.69%; P < 0.05) and reducing non-diagnostic rates (14.43% vs. 46.55%; P < 0.001). This advantage was consistent across all age groups and amplified in older infants. Non-diagnostic image rates decreased with increasing age (0-1 months: 53.33% → 3-12 months: 11.86%) and weight, although field strength was the only independent predictor of diagnostic quality (P < 0.001). Gender has no significant influence on image quality (P > 0.05). Reference biliary diameters showed age-related growth, with CBD diameter increasing from 1.68 ± 0.26 mm (0-1 months) to 2.17 ± 0.40 mm (3-12 months; P < 0.05). The 95th percentile CBD diameter for 3-12 months was 3.12 mm, exceeding prior ultrasound thresholds.
Conclusions:
Magnetic field strength is the primary determinant of infant MRCP image quality. A 3.0 T scanner offers superior diagnostic performance and enables accurate measurement of age-dependent biliary dimensions.
